- Capital: Sanaa
- Population: 39.390.799
- Surface: 527.970 km2
- Devise: le riyal yéménite
- Religion: Majorité Islam
- Appartient à: Ligue arabe, FMI, ONU
- Capital: Riyad
- Population: 33.264.292
- Surface: 2.149.690 km2
- Devise: le riyal saoudien (1 EUR=3,8850 SAR)
- Religion: Majorité Islam
- Appartient à: ACD, Ligue arabe, G20, CCG, FMI, ONU, OPEP